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Deputy Russian Industry and Trade Minister Yury Slyusar said during a Tuesday press conference in Moscow that the investigation established that the catastrophe was the result of the confluence of several factors.

"The plane's crew did not take into calculation the mountainous terrain along the flight route, which was occasioned by various factors. As a result, the crew ignored safety-system warnings," Slyusar said. "There was not established a minimum altitude limit on the radars in Jakarta for the aircraft - which was given a vector - but the radars did not have an audible warning system for the minimum safe altitude necessary for flights in the area of the mountain Salak," he said.

"The pilot's attention was diverted by lengthy conversations not associated with the flight. That was a reason why the pilot controlling the aircraft did not immediately change the aircraft's flight direction, which ended from a western trajectory during banking," he said.

As reported, the SuperJet-100 crashed into the top of the dormant volcano in Indonesia on May 9, resulting in the deaths of all 45 aboard.